Method to Signal Session Termination of a SIP-Initiated Group Multimedia Communication Session
Original Publication Date: 2003-May-16
Included in the Prior Art Database: 2003-May-16
It is expected that future multimedia dispatch communication systems may employ the Session Initiation Protocol (SIP) as the means of controlling multimedia communication sessions. As originally envisioned, SIP defines a simple transactional protocol model to signal initiation, modification, and termination of communication sessions between peer entities. For public safety applications, it is desired that SIP be adapted to work as the signaling control protocol in group communication systems. Any group member wishing to control aspects of the session (e.g. initiating, modifying, or terminating) establishes a SIP control dialog with a SIP entity that represents the group (i.e. the group's “agent”).